First of all, from the speaker itself, the speaker can be divided into tongue spring, dynamic, tube, voltage type, etc. The basic working principle is similar. The most common is the dynamic and tube speakers. Moving speakers can be said to be the most basic template of speakers and the mainstream of speakers. Dynamic speakers drive the sound of paper basin through the audio. The sound range of the dynamic speakers is wide. Through the material of the paper basin and the loop, the impedance is different. The performance is not as good as the old -fashioned tongue spring speaker, and the common speakers are dynamic circular speakers. The working principle of the tube speaker is exactly the same as the dynamic circular speakers. The sound device is also similar to the similar sound of the dynamic speaker paper basin. However, after the reflection resonance of the reflection of the tube is strengthened, the sound is mainly mid -sound, and the scope of diffusion is wide. However High sound distortion is used for publicity.

Next, the composition of modern audio, in terms of channels, common audio is 2.0, 2.1, 5.1, 7.1, and so on. 2.0 channels are common three -dimensional sounds. Two boxes express left single and right single sounds respectively. As a stereo speaker, each box must undertake the task of expressing high, low, and low -frequency. Music generally uses a three -dimensional sound. 2.1, that is, a common bass and computer audio, consist of a main speaker that expresses the bass and plays the power amplifier, and two satellite box composition of the left and right mid -tone, respectively. Different tone, the main feature is that the subwoofer performance ratio is obvious, and the 2.1 audio is mainly active speakers. In the 5.1 era, the sound field composed of simple three speaker boxes still cannot restore the live effect to the greatest extent, and the frequency of bass and mid -tone is not accurate. Midtone speaker, responsible for the background music rear left and right surround box and 0.1 heavy low speaker composition. The 5.1 audio is mostly prone, and 7.1 audio adds the left and right surround boxes on the basis of 5.1 to make the sound field expression More accurate.